I can't think of any paper I've used where sel toner did not produce some kind of color shift. Maybe some of us are more attuned to it than others. I consider it an important fine-tuning control to the image, just like the subtle yet significant change in the DMax. The degree of development and kind of
developer is very significant in this respect, as well as the specific type of paper, toner conc temp&time; and in VC papers, even to what degree the two layers are respectively exposed. Ilford MGIV does seem somewhat less sensitive in this respect than many other papers, esp the RC version.
But that's one reason I rarely use MGIV.